How the Trick Actually Works
This is the part that makes the method so satisfying. Instead of manually polishing tarnish off the surface, the aluminum foil bath helps trigger a reaction that moves the tarnish away from the silverware. Tarnish on silver is typically silver sulfide, and in this setup, the aluminum acts as the more reactive metal in the solution.
That encourages the sulfur compounds to leave the silver and bind elsewhere, helping restore the brighter surface underneath. Household guides commonly use the baking soda–foil bath specifically for this reason.In other words: you’re not just loosening dirt. You’re helping reverse what caused the discoloration in the first place.
That’s also why this method feels so much faster than standing over the sink rubbing each fork one by one.
